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7.5.4 Generating main procedures

When AutoOpts generates the code to parse the command line options, it has the ability to produce any of several types of main() procedures. This is done by specifying a global structured value for main. The values that it contains are dependent on the value set for the one value it must have: main-type.

The recognized values for main-type are guile, shell-process, shell-parser, main, include, invoke, and for-each.

• guile: main and inner_main procedures
• shell-process: emit Bourne shell results
• shell-parser: emit Bourne shell script
• main: user supplied main procedure
• include: code emitted from included template
• invoke: code emitted from AutoGen macro
• for-each: perform function on each operand
• procedure to handle each argument
• handler procedure type
• code for handler procedure
• for-each main procedure options